=Gros104 On the issue of case fans, Iv'e read that the best combination is an intake at the front and exhaust at rear. Will the addition of an intake fan and/or exhaust funnel on the side make much of a difference?

You said you have an all in one mobo - I doubt there would be any distinct heat spots created by it, unlike a normal mobo. However, should you in future be installing a high end Vid Card (eg Radeon 9800 or above) then you may want to think about a side intake fan to eliminate the dead spot that usually forms around the AGP and PCI slots. This would help keep some components cool, but do little for the CPU.

Like you said, the front to rear air movement model is best.